As a resident of Brunei, i travel by motorcycle to neighbouring countries and often roaming charges are ridiculously high. This app has maps for most of the countries i would ride to packaged in a lifeproof casing on a 4s. Brunei map is adequately detailed and pretty up to date. Maps of Sabah seem quite detailed and up to date. Id recommend this over the cheaper others because the overall interface and usability is superb. Voice nav works well too. Highly customisable. This app is the end of the consumer garmin type devices.
Update:
The app gets better and better with music fading and other useful customisations. Well done. The only issues so far ive had are the occasional lag when performing slow manuerves and sometimes missing a turn when gps updates too slow and also East Malaysian maps are not as up to date. I like the sharp corner voice instructions that tells me the upcoming twists and turns included here but there is only one voice that works with it. None of the female voices work so you only get beeps and sounds to warn you. Maybe include more or all voices with this? Also the warnings arent as sensitive to the road conditions as the settings included. Im sure the developers will continue pushing forward as they have done since day one (ive used this for a few years now) and will continue to recommend this app highly. - Nov 2014.
Naughtilus about Sygic Southeast Asia, v14.5.0